Device and method for opening an airway

ABSTRACT

The present invention provides devices and methods for creating and/or maintain patency of the upper airway passage. The device is configured to fit under the chin of a subject at an external location corresponding approximately with the subject&#39;s internal soft tissue associated with the neck&#39;s anterior triangle. The device includes structural elements designed to optimize comfort, compliance and seal achieved through minimizing the pressure variation along the contact surface of the therapy device.

CROSS-REFERENCE TO RELATED APPLICATIONS

The present invention is a continuation of U.S. patent application Ser.No. 16/071,880, filed Jul. 20, 2018, now U.S. Pat. No. 11,058,570, whichwas filed under 35 U.S.C. § 371 as the United States national phase ofInternational Application No. PCT/US2017/014397, filed Jan. 20, 2017,which designated the United States and claims priority from U.S.Provisional Application No. 62/281,063, filed Jan. 20, 2016, each ofwhich is hereby incorporated by reference in its entirety, including alltables, figures and claims.

BACKGROUND OF THE INVENTION

The following discussion of the background of the invention is merelyprovided to aid the reader in understanding the invention and is notadmitted to describe or constitute prior art to the present invention.

The external application of negative pressure to patients for palliativeor therapeutic purpose is well established in the medical arts.

U.S. Pat. Nos. 5,343,878, 7,182,082, and 7,762,263 describe variousdevices which purport to utilize external application of negativepressure upon the external neck surface of patients. A therapeuticappliance is typically provided that has a surface which is configuredto enclose an external area of the throat (the term “throat” as usedherein referring to the anterior portion of the neck extendingapproximately from the chin to the top of the sternum and laterally to apoint posterior to the external jugular vein) overlying a portion of theupper respiratory passage. In certain embodiments, these appliances canprovide a chamber element (e.g., a hollow space filled with airmolecules) lying between the interior surface of the chamber element andthe throat. The therapy appliance is operably connected to an air pumpwhich is configured to produce a partial vacuum in this chamber element.Application of a therapeutic level of negative pressure in the chamberelement elicits movement of the upper airway and may alleviateconditions such as snoring, sleep apnea, and full or partial airwaycollapse for example.

In these “negative pressure” therapeutic apparatuses and methods it isdifficult to obtain a proper and comfortable fit between the apparatusand the patient to create and maintain the differential negativepressure (relative to atmospheric pressure for example) at the desiredlocation on the patient. This is particularly true as the devices areintended for daily wear for many hours; thus, any points of highpressure from the device's sealing flange element on the user's skinsoon become too uncomfortable for continued use. Further, success ofthese negative pressure therapies is optimized by a device's ability toaccommodate (flex, bend, flow, etc.) varying anatomical features (i.e.device compliance). User compliance with therapy is maximized by a goodcomfortable interface between the device and the user. Finally, thedevice should also accommodate movement to different sleeping positionswithout loss of seal.

BRIEF DESCRIPTION OF THE INVENTION

It is an object of the invention to provide a therapy device with sealedchamber element and a flange element adapted to form a conformingsealing surface between a device that is intended to attach and seal toa patient's external tissue, such as a face, a neck, an area surroundinga wound, etc. This therapy device is particularly suited for forming asealed chamber element that is configured for the administration ofnegative pressure to a targeted therapy on the external tissue of anindividual.

In a first aspect, the invention provides therapy devices configured forthe administration of negative pressure upon the external surface of theindividual. These therapy devices comprise:

a chamber comprising

-   -   (i) a flange element defining a periphery of the chamber element        and adapted to form a sealing surface when mated to the        individual, wherein a first surface of the flange element is        configured to approximately conform to a continuous contact area        on the individual defined by a first location approximately        corresponding to a first gonion on one side of the individual's        mandibular body, a second location approximately corresponding        to the individual's mental protuberance, a third location        approximately corresponding to a second gonion on the opposite        side of the individual's mandibular body, and a fourth location        approximately corresponding to the individual's thyroid        cartilage,    -   (ii) a chamber element affixed to the flange element such that        an airtight junction is provided between the flange element and        the chamber element, wherein the chamber element is configured        to define a chamber overlying the external surface of the        individual bounded by the flange element and to apply a force to        the external surface of the individual when a therapeutic level        of negative pressure is applied within the chamber element, the        force sufficient to maintain patency of the upper airway by        drawing the external surface of the individual into the chamber        element,    -   (iii) one or more first recesses located approximately at a        junction formed between the flange element and the chamber        element approximately corresponding to the second location, the        first recesses providing a first hinge region within the chamber        element, and    -   (iv) one or more second recesses within the chamber element        located approximately at a junction formed between the flange        element and the chamber element approximately corresponding to        the fourth location, the second recesses providing a second        hinge region within the chamber element,    -   wherein the flange element varies in thickness such that the        second location is substantially thicker than the first and        third locations and the first and third locations are        substantially thicker than the fourth location;    -   wherein the flange element varies in width such that the fourth        location is substantially wider than the first and third        locations;    -   wherein the junction formed between the flange element and the        chamber element at the first and third locations are positioned        on the flange element such that greater than about 50% but less        than about 60% of the width of the flange element is positioned        within the interior of the chamber element;    -   wherein the junction formed between the flange element and the        chamber element at the fourth location is positioned on the        flange element such that less than about 50% but more than about        40% of the width of the flange element is positioned within the        interior of the chamber element;    -   wherein the first and second hinge regions and the configuration        of flange element and the chamber element are configured (i) to        reduce the transmission of deformational strain within the        chamber element relative to a chamber element lacking the first        and second hinge regions and (ii) to reduce non-uniform force        loads applied by the flange element when the chamber element is        mated to the individual and the therapeutic level of negative        pressure is applied within the chamber element by approximately        equalizing the sum of hoop stress and truss stress across the        continuous contact area; and        an air pump operably connected to the chamber element to produce        the therapeutic level of negative pressure within the chamber        element.

The terms “external area” and “external surface” of an individual asused herein refers to a portion of the external skin surface of theindividual. In various embodiments, the therapy device is configured toprovide optimized fitting parameters, for example, seal, comfort andlocal device compliance throughout all points of contact. This ispreferably achieved by minimizing the contact pressure differential fromone point of contact on the skin of a patient to another through designfeatures of the flange element and design features of the sealed chamberelement of a negative pressure therapy device.

Preferably, the one or more first recesses and/or the one or more secondrecesses are within the chamber element. In certain embodiments, thechamber element comprises two first recesses approximately positioned atthe individual's mental tubercles. These two recesses are preferablyvoids in the material of the chamber element, most preferably in theinternal surface of the chamber element. The two recesses are mostpreferably positioned laterally from one another so as to flank the chinof the wearer.

In certain embodiments, the location on the width dimension of theflange element at which the junction is formed between the flangeelement and the chamber element varies around the circumferentialdimension of the flange element. By varying the junction, the magnitudeof forces applied to the skin surface of the individual can be variedfrom point to point around the continuous contact area. In this manner,the force applied to the external surface of the individual at any pointalong the circumferential dimension of the flange element may be made tobe “constant.” In this context, the term “constant” as used herein,refers to maintaining the force within about 20%, and more preferablyabout 10%, of the average force along the entire circumferentialdimension of the flange element, where the force at each point along thecircumferential dimension of the flange element is measured at thelocation on the width dimension of the flange element at which thejunction formed between the flange element and the chamber element.Preferably, the junction formed between the flange element and thechamber element at the second and fourth locations are positioned on theflange element such that between about 30% and about 50% of the width ofthe flange element is positioned within the interior of the chamberelement. The exterior dimension is measured from the outside edge of theflange element to the midpoint of the flange element/chamber elementjunction, and the interior dimension is measured from the inside edge ofthe flange element to the midpoint of the flange element/chamber elementjunction.

In certain embodiments, the flange element will contact the chamberelement at approximately a normal angle, wherein a normal angle isdefined as a geometry where the plane of the flange element isperpendicular to the plane of the chamber element at the junction. Infurther embodiments, the angle at which the chamber element intersectsthe flange element at the junction that is formed between the flangeelement and the chamber element varies around the circumferentialdimension of the flange element. By varying the angle at the junction,the flange element can be positioned to better follow facial contoursand can vary up to 60 degrees from a normal angle. Angling the flangeelement on the chamber element may also further assist in the evendistribution of the magnitude of forces applied to the skin surface ofthe individual which can be varied from point to point around thecontinuous contact area. The outer part of the flange (outbound from thehinge like joint with the chamber element) can be further biased so thatthe outer part of the flange element makes primary contact duringinstallation and final contact during removal or dislodging events forexample making the edge of the flange element exterior to the chamberelement the first and or last points of contact of the flange element onthe user. This angle bias of the outer part of the flange from theflange having a flat contour on the skin can be up to 45 degrees.

In various embodiments, the chamber element is affixed to the flangeelement as an integral structure, as a unitary structure, or as discretestructures.

In certain embodiments, the flange element comprises a tacky materialinherent in, or positioned on, all or a portion of the contact area. Byway of example only, the tacky material can comprise a room-temperaturevulcanizing (RTV) silicone. The tacky material may be a single layer, ormay be a component of a lamination stack of materials positioned on allor a portion of the contact area.

In certain embodiments, the flange element is increased in thickness atthe junction formed between the flange element and the chamber element,relative to thickness at the edges of the flange element. This thicknessmay be varied at different points on the flange element. By way ofexample, at the first and third locations the flange element thicknessat the junction formed between the flange element and the chamberelement may be between about 0.05 inches and about 0.120 inches, and theflange element thickness at the edge is between about 0.005 inches andabout 0.025 inches; while at the second location, the flange elementthickness at the junction formed between the flange element and thechamber element is between about 0.05 inches and about 0.20 inches, andthe flange element thickness at the edges is between about 0.05 inchesand about 0.120 inches; and at the fourth location, the flange elementthickness at the junction formed between the flange element and thechamber element is between about 0.020 inches and about 0.100 inches,and the flange element thickness at the edges is between about 0.005inches and about 0.020 inches.

In preferred embodiments, the flange element has curved profile on thetop surface thereof and a flattened profile on the bottom surfacethereof. This type of profile provides the increased thickness at thejunction formed between the flange element and the chamber element,relative to the edges thereof.

Any and all air pump types find use in the present invention, providedthat a therapeutic level of vacuum can be achieved by the pump. Incertain embodiments, the air pump is connected to the apparatus via ahose or tube. Preferably, the air pump is wearable by the patient and isbattery powered, and most preferably the air pump is configuredintegrally to the apparatus. In certain embodiments, the air pump may bea manual squeeze bulb, or may be electric and comprise a piezoelectricmaterial configured to provide an oscillatory pumping motion. It is mostpreferred that the oscillatory pumping motion operates at a frequencygreater than 500 Hz.

In those embodiments where the air pump is configured integrally to theapparatus, the chamber element can comprise an opening into which theair pump engages, wherein when engaged a periphery of the opening formsan airtight seal with the air pump. A compliant sealing ring may beprovided within the opening into which the air pump engages. Thiscompliant sealing ring may be provided integrally with the chamberelement, and most preferably as a unitary structure with the chamberelement. Alternatively, the compliant sealing ring and the chamberelement are discrete structures, where the sealing ring may be in theform of a separate o-ring for example. As an alternative to providingthe compliant sealing ring as a component of the chamber element, thecompliant sealing ring may be provided as a component of the air pump.

In embodiments where the compliant sealing ring chamber element and pumphousing are discreet structures, and wherein the compliant sealing ringis an O-ring type sealing element, the O-ring can be compressed betweenthe sealing surfaces of the pump housing and chamber element to createan air-tight seal. Further, the O-ring type sealing element can be inthe form of an O-ring gland design wherein a molded or machined channelor groove is provided on either the surface of the pump housing or thesurface of the chamber element and an O-ring fitted in the channel suchthat when the pump housing and chamber element are fitted an air-tightseal is achieved. As an alternative to providing the O-ring type orO-ring gland designed compliant sealing ring as a component of thechamber element, the compliant sealing ring may be provided as amintegrated or discrete component of the air pump.

In further embodiments, a compliant sealing ring, being providedintegrally with the chamber element, may consist of raised elementwithin the opening where the raised element may be a lip-type seal, alsoknown as radial shaft seals, for example. Alternatively, the lip-typecompliant sealing ring and the chamber element are discrete structures,where the sealing ring may be in the form of a separate lip-type sealfor example. As an alternative to providing the compliant sealing ringas a component of the chamber element, the compliant sealing ring may beprovided as an integrated or discrete component of the air pump.

In certain embodiments, the chamber element comprises one or more ventelements configured to provide an airflow into the chamber element whenthe chamber element is mated to the individual and the therapeutic levelof negative pressure is applied within the chamber element. This airflowis preferably between about 10 mL/min and about 200 mL/min, and mostpreferably between about 30 mL/min and about 150 mL/min, and still morepreferably between about 75 mL/min and about 125 mL/min. The ventelement can comprise an aperture and a filter element within theaperture, wherein the filter element comprises a pore size of about 0.25μm or less, such as a pore size of about 0.1 μm. The filter element canbe configured as a replaceable element. The level of airflow can bemaintained as a constant value. Alternatively, the level of airflow canvary. In certain embodiments, the level of airflow tied to thetherapeutic level of vacuum; that is, a higher level of vacuum can beaccompanied by a higher level of airflow due to the differential inpressure between the atmospheric side of the vent elements and theinterior of the chamber element. In certain embodiments the vacuumsource may be used in a variable manner to maintain the therapeuticlevel of vacuum within a specified range rather than a single value, andthe level of airflow can vary in concert with the level of vacuum.

It is preferred that the chamber element comprises an unloaded spacingmeasured between the first and third locations that is narrower than aspacing obtained when the chamber element is mated to the individual andthe therapeutic level of negative pressure is applied within the chamberelement. This unloaded spacing can impart a preload force to theindividual by the chamber element prior to the application of negativepressure.

In related aspects, the present invention relates to methods of applyingnegative pressure therapy to an individual in need thereof, comprisingmating a therapy device as described herein to the individual, andapplying a therapeutic level of negative pressure within the chamberelement, thereby increasing patency of the airway of the individual.Such methods can be for treatment of sleep apnea; for treatment ofsnoring; for treatment of full or partial upper airway collapse; fortreatment of full or partial upper airway obstruction; for negativepressure treatment of a wound caused by, for example an injury or asurgery; etc.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is top view of an illustrative embodiment of the therapy deviceincluding the chamber element 100, flange element 105, flangeelement/contact surface of the flange element 106, O-ring element 110and air pump aperture 115.

FIG. 2 is a rear view of an illustrative embodiment of the therapydevice including the chamber element 100, contact surface of the flangeelement 106, O-ring element 110 and air pump aperture 115.

FIG. 3 rear view of an illustrative embodiment of the therapy deviceincluding the chamber element 100, the contact surface of the flangeelement 106, air pump orientation tab 122, upper region(s) of hoopstress 125 and lower region(s) of hoop stress 130, corresponding tofeatures on the individual at the second location, at approximately thechin/mandible and fourth location, at the lower neck at approximatelythe laryngeal prominence respectively.

FIG. 4. is a rear view, looking from bottom to top of an illustrativeembodiment of the therapy device including the chamber element 100,contact surface of the flange element 106, 135 and a cross-sectionalplane 140 for illustration purposes in FIG. 5.

FIG. 5 is a cross-sectional side view (FIG. 4, 140) of an illustrativeembodiment the therapy device, showing the chamber element 100, contactsurface of the flange element 106, flange element to chamber elementjunction/root 109, air pump orientation tab 122, a cross section of thechin/mandible recess 125 and tapered edge(s) of the flange element 145.

FIG. 6a is a rear view of an illustrative embodiment of the inventionshowing the therapy device chamber element 100, contact surface of theflange element 106, inside root flange element width 107, air pumpaperture 115, air pump orientation tab 122 and a section plane 150 alongA-A for purposes of FIG. 6 b.

FIG. 6b is a sectional view along plane A-A showing the bottom of thetherapy device with the chamber element 100, contact surface of theflange element 106, flange element to chamber element junction/root 109,O-ring feature 110, air pump aperture 115, air pump orientation tab 122,neck relief recess 155, neck relief detail box 150 for FIG. 6c and asection plane 160 along B-B for purposes of FIG. 6 d.

FIG. 6c is a detail view 150 of the neck relief recess 155, showing aportion of the chamber element 100 and the compressible region thatapproximately conforms with location four on the user at approximatelythe laryngeal prominence 165.

FIG. 6d is a section view along plane B-B 160, showing a section of thechamber element 100, contact surface of the flange element 106, insideroot flange element width 107, outside root flange element width 108,tapered edge(s) of the flange element 145 and neck relief recess 155.

FIG. 7 is a three dimensional rear view of an illustrative embodiment ofthe therapy device including the chamber element 100, the contactsurface of the flange element 106, the O-ring feature 110, air pumpaperture 115, and vertical line bisecting the therapy device 120 forpurposes of FIG. 8.

FIG. 8 is a two dimensional rear view of an approximate trace of halfthe therapy device, where the therapy device is pressed against a flatsurface and traced along its edges. The trace is bisected along thevertical axis 120 of the therapy device (FIG. 7, 120), showing theflattened half of the chamber element 100 including the flattenedcontact surface of the flange element 106, the inside root flangeelement width 107, the outside root flange element width 108, the flangeelement further having parallel dashed lines 170 showing theroot/junction 109 of the chamber element on the flange element,approximately following the curvature of the flange element as anapproximate example of the location(s) of the chamber element of thesurface distal to contact surface of the flange element, the contactsurface of the flange element divided into stations 1-20 for graphicalrepresentation in FIG. 9-FIG. 14.

FIG. 9 is a table showing approximate flange element dimensions alongstations 1-20, including total flange element width, width of the flangeelement inside the root “inside width”, width of the flange elementoutside the root “outside width”, flange element thickness inside andoutside the root, and flange element thickness at the inner and outeredges of the flange element.

FIG. 10 is a graphical representation of the approximate flange elementwidth along stations 1-20.

FIG. 11 is a graphical representation of the approximate flange elementthickness on the outside of the root and approximate flange elementthickness inside the root.

FIG. 12 is a graphical representation of the approximate balancing loadsprovided by cantilever structure elements and hoop structure elements ofthe therapy device along stations 1-20 for the purpose of balancingstation loads.

FIG. 13 is a graphical representation of the approximate station loadvariation along stations 1-20 when accommodating structural features areincorporated into the device, the device is placed on the user and atherapeutic level of negative pressure is applied.

FIG. 14 is a cross sectional view 160 of an illustrative embodiment ofthe therapy device showing the vacuum side (root inside) 107 and airside (root outside) 108 of the device, the chamber element 100, flangeelement 105, contact surface of the flange element 106, tapered edge(s)of the flange element 145, a representation of compressed tissue 180,the root/junction/balance point 109 of the chamber element 100 on theflange element 105, total flange element width (perpendicular width)185, chamber element bias on the flange element 192 (root inside) 107,acting vacuum portion of the flange element 195 and contact pressurerepresentation of the flange element on the user 200.

FIG. 15A depicts a region approximately corresponding to the thyroidcartilage bounded by the dotted lines.

FIG. 15B depicts a region approximately corresponding to gonion boundedby the dotted lines.

FIG. 15C depicts a region approximately corresponding to the mentalprotuberance bounded by the dotted lines.

FIG. 16 depicts the rear (the aspect facing the wearer) of the therapydevice. A line bisecting the device is shown for purposes of FIG. 17.

FIG. 17 depicts a three-dimensional view and a detail box of the therapydevice of FIG. 16 bisected along the line shown in FIG. 16.

FIG. 18 depicts a detail of a lip-seal feature and lip-seal cavity in achamber element of the invention.

FIG. 19 depicts the lip seal of FIG. 18 upon insertion of a pump housingelement.

DETAILED DESCRIPTION OF THE INVENTION

The present invention and the various features and advantageous detailsthereof are explained more fully with reference to the non-limitingembodiments that are illustrated in the accompanying drawings anddetailed in the following description. It should be noted that thefeatures illustrated in the drawings are not necessarily drawn to scale.Descriptions of well-known components and processing techniques areomitted so as to not unnecessarily obscure the present invention. Theexamples used herein are intended merely to facilitate an understandingof ways in which the invention may be practiced and to further enablethose of skill in the art to practice the invention. Accordingly, theexamples should not be construed as limiting the scope of the invention.In the drawings, like reference numerals designate corresponding partsthroughout the several views.

In the present invention, a therapy device is designed for a negativepressure therapy device that maximizes comfort and seal efficiencyultimately optimizing device efficacy and user compliance. The negativepressure therapy device is described below for use in the opening of theupper airway when placed upon the neck of a subject over a surfacecorresponding to approximately the upper airway of the subject. Thisexemplary application of the technology is not meant to be limiting. Thetherapy device comprised of a chamber element and a flange elementconfigured to be the contacting surface between the chamber element andthe user described herein is configured to provide for regional loadequalization over the interface between a negative pressure therapydevice and the three dimensionally varying skin surface of the user soas to maintain a near uniform contact pressure over this non-uniformsurface.

In particular, the therapy device referred to herein relates but is notlimited to an external therapy appliance for relieving upper airwayobstruction. U.S. patent application Ser. Nos. 12/002,515, 12/993,311and 13/881,836 which are hereby incorporated by reference in theirentirety including all tables, figures and claims, describes a therapyappliance for relieving airway obstruction. Increasing the patency ofthe upper airway of an individual alleviates conditions such a snoring,sleep apnea, full or partial upper airway collapse. As describedtherein, a device is configured to fit under the chin of a user at anexternal location corresponding to the soft tissues overlying the upperrespiratory passages of the neck.

For purposes of the patent application, the term “about” refers to+/−10% of any given value.

The therapy device of the present invention comprises a chamber elementand a flange element attached to the edge of the chamber element alongthe circumferential dimension of the flange element to form an airtightjunction between the flange element and the chamber element. Thejunction between the flange element and the chamber element is referredto herein as the “root” of the junction. The location of this root onthe flange element may be varied around the circumferential dimension ofthe flange element for purposes of contact pressure balancing. Anexample of this is provided in FIG. 9. Because the root is not a point,for purposes of determining the percentage of the flange element widththat is inside the vacuum side of the chamber element and the percentagethat is outside, the measurement is taken from the midpoint of the root.

As used herein, the term “circumferential dimension” refers to acontinuous location along the width of the flange element, in somecases, for example where the chamber element makes continuous contactwith the flange element. As used herein, the “root” is the location atwhich the chamber element contacts the flange element and is of a widthenclosed by the thickness of the chamber element. The chamber elementmay be affixed to the flange element as an integral structure, unitarystructure or discreet structures. An “integral structure” refers to astructure that is a complete piece formed by joining two or morecomponents which, once joined, become a single piece that is notseparable without destroying the device. A “unitary structure” refers toa structure that is a singular structure formed or molded as a singlepiece. Two elements are “discreet structures” if the two (or more)structures form a single working structure, but retain individualcharacteristics and can be separated in the normal course of use of thesingle working structure and then reassembled.

Surface variation of the therapy site, both permanent and occasional(i.e., the shape of the mandible, transition points from neck tomandible, tissue types, scars, facial hair and/or skin blemishesdifferential forces applied to different portions of the seal caused bymovement of the wearer, etc.) can undesirably disrupt the seal betweenthe negative pressure therapy device and user. The present inventionprovides devices, systems and methods of use that can accommodatevarying facial contours/features and adapt to movement, resulting ingreater comfort, reduced vacuum leakage and improved therapeuticefficacy.

The chamber element and the flange element of the sealing surfaceincorporate cantilever-like structures, hoop load-like structures and ora combination of the two, adapted to have sectional properties thatallow for stiffness, flexibility and uniform regional compliance and/orforce load on the skin surface of the individual. As used herein,“regional compliance” refers to a property of the device that permitsthe device to “mold” itself to a surface and or surface variation on thecontact surface with the wearer. As described hereinafter, uniformregional compliance is provided, in part, by the sectional properties orstructural features associated with a region on the chamber element,flange element or both.

The flange element preferably comprises a flexible, elastic materialthat can be uniform in thickness and width but also vary in thicknessand width to achieve the structural properties desired at locationsalong the contact surface of the therapy device. The flange element mayfurther contain a curved profile on the top surface and a flat profileon the bottom surface. The top surface of the flange element being thatwhich makes contact with the chamber element and the bottom surface ofthe flange element being that which makes contact with the skin of theuser. As used herein a “curved profile” describes the shape of a flangeelement that is thicker at the junction between the flange element andchamber element and thinner towards the outer edges thereof. This isdepicted in FIG. 6d for example. In this figure, the axes X and Yindicate the width and thickness dimensions of the flange element asthose terms are used herein. The flange element as depicted containedges that taper outwardly for avoiding skin deformation and cuttingassociated with hard sharp edges.

Optionally, an adhesive layer is located on the surface of the flangeelement that makes contact with the user. These elements are configuredto maintain an approximate uniform contact pressure with minimizedpressure variations along the skin of an individual through all pointsof contact of the therapy device on a patient. By “minimized pressurevariation” means a pressure at any point between the contact surface ofthe flange element and the patient's tissue varies by no more than about20%, and preferably no more than about 10% or about 5%, from the averagepressure across the entire contact surface. The outer contact surface,as used herein, is the surface of the flange element of the therapydevice that makes contact with the skin of the individual forming thecontact and sealing surface of the therapy device.

In certain embodiments, the flange element of the invention provides acontact interface of a negative pressure therapy device configured toconform to a continuous contact area on the individual at the externalarea of the neck approximately corresponding to the anterior triangle ofthe neck. The term “approximately corresponding to” an anatomicallocation refers to contacting closely to the actual location, shape orsize but perhaps not necessarily completely, accurately or exactly.

Most preferably, the flange element is configured to follow the contourof the therapy device which is designed to approximately conform to anindividual from approximately a first location corresponding to a firstgonion on one side of the individuals mandibular body to a secondlocation corresponding to the individuals mental protuberance to a thirdlocation corresponding to the second gonion on the opposite side of theindividual's mandibular body and a fourth location corresponding to theindividuals thyroid cartilage further configured return to approximatelythe first location corresponding to the first gonion

The gonion, as used herein, describes the approximate location on eachside of the lower jaw on an individual at the mandibular angle. Themandibular protuberance, as used herein, describes the approximatelocation of the chin, the center of which may be depressed but raised oneither side forming the mental tubercles. The thyroid cartilage, as usedherein, describes the approximate location of the large cartilage of thelarynx in humans. A region approximately corresponding to the thyroidcartilage is depicted by the dotted lines in FIG. 15A; a regionapproximately corresponding to the gonion is depicted by the dottedlines in FIG. 15B; and a region approximately corresponding to themental protuberance is depicted by the dotted lines in FIG. 15C. Notethat FIGS. 15B and C show a right profile, and a similar region ispresent on the left profile.

In certain embodiments, the negative pressure therapy device of thepresent invention is a chamber element, approximates a dome, ovalappearance, with a curvature from the middle of the dome that creates acollar to cover an area over the upper airway of an individual. Inpreferred embodiments the negative pressure therapy device containsstructural elements adapted to guide correct placement and orientationof the device on the user, for example a chin cup element. As usedherein a “chin cup” refers to a discreet feature on the negativepressure therapy device which provides a recess configured to receivethe chin of the wearer when the negative pressure therapy device isproperly mated to the wearer. During application of the negativepressure therapy device, the chin cup provides a consistent point ofreference on which the negative pressure therapy device can mate withthe wearer. The shape of the chin cup may vary to allow for anatomicalvariation in patients. For example, the chin cup may be somewhat deeperfor use in a subject having mandibular prognathia; somewhat shallowerfor use in a subject having mandibular retrognathia; or somewhat largerin volume for a subject having macrogenia.

In various embodiments, the present invention comprises a symmetricvacuum chamber element with a flat contact surface adapted to fit to aflat uniform surface and to provide minimized pressure variationthroughout all points of contact when a vacuum is applied. In othervarious embodiments, the present invention comprises a vacuum chamberelement with a contact surface configured to adapt to the inherentanatomical variations of an individual's face. The curved, “wraparound”shape that the negative pressure therapy device must assume can causethe “station load” through different contact points to vary in theabsence of the design features described herein. For example, absent afeature or features designed to accommodate for station load variation,at points furthest from the center of the dome of the therapy device,toward the narrow end portions of the oval, the station load decreasesdue to a lesser vacuum cross section over the contact point(s). As usedherein, “station load” is the force or pressure which is applied at adiscreet area of contact of the device (a “station”) on the skin of anindividual when the device is mated to the individual and a therapeuticlevel of negative pressure is applied.

In certain embodiments, the present invention comprises a chamberelement having a shape that when unloaded, i.e. not on the patient,spacing between the first and third locations is narrower than thespacing that is obtained when the chamber element is mated to theindividual and a therapeutic level of negative pressure is applied. Thenarrower spacing of the unloaded device creates a preload force that isapplied to the individual by the chamber element prior to theapplication of negative pressure.

As discussed herein, the flange element of the instant invention formsthe interface between the chamber element of the therapy device and thecontact surface of the individual. The chamber element of the instantinvention forms the dome/chamber element of the therapy device. Theseelements comprise structural features that provide minimized pressurevariation at stations where contact pressure variation can occur as aresult of either anatomical variation, tissue variation, inherenttherapy device design, and or movement during usage. The flange elementand chamber element thereby providing features to the therapy device tominimize peak contact pressure values, minimize the variance fromstation to station and equalize the contact pressure of the therapydevice when a therapeutic level of negative pressure is applied toprovide an effective seal.

The term “seal” as used in this context is not to necessarily imply thata perfect seal is formed between the therapy device and the contactsurface of the individual. Rather, a “seal” is a portion of the devicewhich mates to the wearer and maintains a therapeutic level of vacuum. Acertain amount of leakage at the seal may be tolerated so long as thedesired negative pressure can be achieved and maintained. Preferredoperational vacuum levels are in a range of between 7.6 cm to about 61cm of water. Preferred forces applied to the user's neck tissues inorder to assist in opening the upper airway passages are in a range ofabout 0.5 kilogram to about 6.68 kilograms. The term “about” and“approximately” as used herein with regard to any value refers to +/−10%of that value.

The dome/chamber element enclosed by the chamber element provides afinite volume which must be evacuated to deliver the desired partialvacuum level. Once generated, the partial vacuum will decay at a ratewhich is primarily controlled by leakage of air into the chamber elementpast the seal and or features integrated into the dome to provideairflow. In certain embodiments, the chamber element encloses a volumeof between 0.5 and 12 in³. Preferably, the leakage is no more thanbetween 0.005 and 0.5 in³/min, and most preferably between about 0.01and 0.1 in³/min.

The therapy device may comprise one or more vent elements. As usedherein a vent element is an aperture through the therapy device thatprovides airflow in to the chamber element when the chamber element ismated to the individual and a therapeutic level of negative pressure isapplied within the chamber element. The aperture(s) can be in anysuitable location on the device however in some embodiments theaperture(s) may be located at the top of the chamber element closer tolocations one and three on the individual. The vent element(s) maysimply be an aperture such that when the chamber element is mated to theindividual and a therapeutic level of negative pressure is applied anairflow between about 10 mL/min and about 60 mL/min is achieved or anaperture through which a filter element can be inserted to createfiltered airflow such that when the chamber element is mated to theindividual and a therapeutic level of negative pressure is applied anairflow between about 10 mL/min and about 60 mL/min is achieved. Thefilter element can be a replaceable element and comprise a pore size ofbetween about 0.25 μm and 0.1 μm or less such that when the chamberelement is mated to the individual and a therapeutic level of negativepressure is applied an airflow between about 10 mL/min and about 60mL/min is achieved. In certain embodiments the airflow is between about30 mL/min and about 50 mL/min.

The present invention provides both sufficient regional, and overall,compliance of the therapy device such that local bottoming/regionalcollapse of the device does not occur under load. As used herein,“regional compliance” of the device refers to the ability of individualstations of the device to accommodate a therapeutic level of vacuumwithout complete compression at that station. As used herein, “overallcompliance” of the device refers to the ability of the device toaccommodate a therapeutic level of vacuum without complete compressionof the device. Further, bottoming or “regional collapse”, as usedherein, is defined as a complete or near complete compression of thedevice that its resistance to further compression is no longer possible.This results in a hardening of supporting structure(s) by the flexibleportions of the device under a heavy load, and loss of comfort by thewearer.

The flange element and chamber element are designed to create uniformcontact pressure onto the skin of the user when a therapeutic level ofnegative pressure is applied. The flange element is preferably aperpendicular width (wide and narrow) and thickness to achieve thedesired contact pressure properties. The perpendicular width componentis the total width of the flange element, from the tip of the outsideedge of the flange element through the root and to the tip of the insideedge of the flange element. The width of flange element may vary alongthe peripheral axis of the contact area of the flange element (FIG. 8)to accommodate for station load variations due to non-uniform shape ofthe therapy device that contains a chamber element, that is oval inshape and further contains a central bend to accommodate the matingsurface on the neck of the patient corresponding to approximately theupper airway and maintain a constant contact pressure of the negativepressure therapy device.

In various embodiments, locations on the flange element of the devicemay be substantially wider than other locations. In one aspect the totalflange element width may vary from approximately 28.0 millimeters toapproximately 17.0 millimeters, (FIG. 9). “Substantially wider” as usedherein refers to an increase in width of at least about 10%, morepreferably at least about 20%, and still more preferably at least about30% or more from one location to another, for example in an embodimentof the invention the width of the flange element at the fourth locationcorresponding to approximately the middle of the neck of the user isapproximately 39% wider than the first and third locations thatcorresponding to the mandible and gonion regions of the user. Widersections may be found in regions where a larger load displacement isneeded for example at the second and fourth locations and narrowersections may be found in regions where smaller load displacement isneeded for example at the first and third locations on the user.

The thickness of the flange element may also vary along theperpendicular width along the circumference of contact surface of thetherapy device to accommodate for anatomical variation and varyingvacuum cross section. As used herein, thick or thin, describes thedistance between the surface of the flange element contacting theindividual and the (distal) surface of the flange element contacting thechamber element of the vacuum chamber element of a negative pressuretherapy device. The thickness of the flange element at the root may varyfrom approximately 4.5 millimeters to 1.0 millimeters at the inside ofthe root and 3.0 millimeters to 1.2 millimeters at the outside of theroot. For example, the thickness of the flange element at the junctionat the first and third locations on the user may be about 1.6millimeters inside the root and 2.10 millimeters outside the root.

In certain aspects, locations on the flange element of the device mayvary in thickness such that some portions are substantially thicker thanothers. For example, locations of the flange element may vary inthickness such that on location is substantially thicker than another.As used herein, “substantially thicker” refers to an increase inthickness of at least about 20%, more preferably at least about 30%, andstill more preferably at least about 50% or more. For example, in anembodiment of the invention the thickness at approximately the secondlocation is approximately 64% thicker that the first and third locationsand the first and third locations are approximately 30% thicker than thefourth location.

The thickness of the flange element may further taper outwardly from theroot location to a final flange element thickness of approximately 0.7millimeters to approximately 0.1 millimeters. The taper may begin at theroot continuing to the inside or outside edge of the flange element orthe taper may also begin at points about 10%, 15%, 20%, 25%, 30%, 35%,40%, 45%, 50%, 55%, 60%, 65%, 70%, 75%, 80%, 85%, 90% or 95% away fromthe tip of the flange element and continue to the inside or outside edgeof the flange element to a desired final thickness of approximately0.7-0.1 millimeters. The taper of the flange element at its inner andouter edges assisting in the elimination of edge effects allowing forminimized tissue irritation and damage. As used herein, “edge effects”refer to the irritation, (redness, swelling) of tissue caused byprolonged contact pressure of a sharp edge on the skin. The tapering ofedges provides for a more flexible and softer edge of the flangeelement.

The chamber element is stiff along its length and the flange elementwill not appreciably deflect longitudinally. Therefore in addressing thedynamic shape of the target therapy area, regions of the therapy devicecontain accommodating design features, for example, the variations inthe width and thickness of the flange element, that are designed tominimize high pressure points and eliminate contact pressure variationsof the therapy device along its contact surface when placed on the userand a therapeutic level of negative pressure is applied.

In regions where the flange element contacts a substantially flatsurface of the user, the chamber element and flange element can act asan “I-beam” where the force exhibited by the flange element on the useris a more linear downward force and cantilever-like. The flange elementinside and outside the root point of the chamber element flex accordingto the thickness of material with the tapered ends of the flange elementflexing the most creating a soft transition on the skin of the usereliminating edge effects as above. As used herein cantilever-like forcesare a measurement of the downward force of the chamber element dividedby the area of the flange element at a given point. By way of example,in regions where the flange element lays flat across the skin,cantilever forces can be balanced by altering the width and thickness ofthe flange element, for example where there is a high vacuum crosssection and where larger load distribution is desired (ie. lower contactpressure), a flange element with a larger perpendicular width may beutilized and similarly in regions where a smaller load distribution isdesired (ie higher contact pressure) a flange element with a smallerperpendicular width may be utilized

The thickness dimensions of the flange element can give the flangeelement properties such that in portions of the device, if the flangeelement is too thin, though it may be very flexible it will have littleto no load distributing properties, can bottom out creating point(s) ofhigh contact pressure from the root of the chamber element resulting inleaks and/or discomfort. If the flange element is too thick it willaffect its ability to change direction for example be unable to conformto the acute change from the surface of the neck over the mandibletoward the ear for example and further allow for an undesirable level ofsheer or lateral movement. In a similar fashion, if the width of theflange element is too small it can create a point(s) of high pressureand too wide it may create unnecessary bulk affecting fit and effectivetherapy area. Transition in widths taper gradually and the aspect ratiominimizes positional instability and optimizes flexibility.

In regions where the flange element contacts a curved surface of theuser, for example around the chin and over the mandible, the forcesobserved contain an additional hoop-like force component as the flangeelement bends around those features. “Hoop-like forces” as used hereindescribe the distribution of force exerted circumferentially, forexample, as the flange element travels around location four of the ofthe user the curvature adds additional stiffness to the flange elementinside and outside the root of the chamber element. In these regionswhere the added force component of hoop loads exists, the thickness ofthe flange element may be decreased and the perpendicular width of theflange element may be increased to effectively distribute the load ofthe chamber element and minimize contact pressure variation from stationto station when a therapeutic level of negative pressure is applied.

The term “contact pressure” as used herein refers to a pressure impartedon the surface of the skin by the contact surface of the device. It'svalue can depend on the vacuum present as well as the structuralcharacteristics of the flange element such as the perpendicular widthand surface area of the contact surface, and can vary at differentlocations on the flange element.

A larger “perpendicular width” of a contact surface (meaning thedirection that is perpendicular to the longest axis of the contactsurface, which longest axis may be curved) will have a lower overallcontact pressure under the same vacuum pressure as a contact surfacewith a smaller perpendicular width due to the increased surface area atthat particular station of the contact surface. Therefore, in regionswhere the dome station pressure load is low, the contact surface of theflange element can be designed to be of a smaller perpendicular width toeffectively increase and “balance” the contact pressure and in regionswhere the dome station pressure is high, the contact surface of theflange element can be designed to be of a larger perpendicular width toeffectively decrease and balance the contact pressure where the domestation load is high.

In certain embodiments, the angle of the flange element on the chamberelement at the root location could be fixed at a predetermined angle,wherein the angle is fixed around the entire circumferential dimensionof the flange element, for example where the flange element issubstantially normal (however this angle can vary +/−60 degrees fromnormal around the periphery of the chamber element to better match localfacial contours). The outer edge of the flange can be further biased sothat this edge or part of the flange element makes first and or lastcontact on the user during application, removal and usage of the therapydevice. For example, when the flange element is angled such that theouter edge of the flange element exterior to the chamber element isbiased inward toward the user's skin, the outer edge of the flangeelement will become the initial point of contact of the flange elementduring application of the therapy device. Similarly, when the flangeelement is angled such that the edge of the flange element interior tothe chamber element is angled inward toward the interior of the chamberelement, the outer edge of the flange element will become the finalpoint of contact of the flange element during removal of the therapydevice. Removal of the therapy device can include taking the device offthe user when therapy is complete or include events where the devicebegins to dislodge during use. With the flange element angled inwardtoward the chamber element, the edge of the flange element exterior tothe chamber element is biased to maintain the seal at the outer edge aslong as possible and or until the dislodging event terminates. Anglingthe flange element on the chamber element may also further assist in theeven distribution of the magnitude of forces applied to the skin surfaceof the individual can be varied from point to point around thecontinuous contact area.

In certain embodiments the location of the chamber element on the flangeelement (the root location) may vary from the mid-point, inward oroutward to further aid in equalizing the contact pressure of the therapydevice on the user when a therapeutic level of negative pressure isapplied creating and maintaining the balance point of the flange elementon the user. For example, movement of the root of the edge of chamberelement on the flange element outward from the mid-point of the flangeelement effectively increases the vacuum cross section and thereforeeffective contact pressure of the therapy device at that point when atherapeutic level of negative pressure is applied. Movement of the edgeof the chamber element inward has an opposing effect, providing a largerportion of the flange element exposed outside the root location andtherapy area decreasing the vacuum cross section. In embodiments of theinvention the root location of the chamber element on the flange elementis approximately demonstrated in the table in FIG. 9. In regions wherehigher contact pressure is needed, for example where the deviceapproaches the ear of the user, the chamber element location can bebiased on the flange element toward the outer edge increasing the vacuumcross section and effective contact pressure at that point.

In certain embodiments the chamber element may contain features thatfurther aid in the prevent regional collapse, bottoming and transfer offorce from one region to another of the therapy device. Absent localpoints of flexibility, a rigid chamber element may experience situationswhere external pressure could cause a point of high contact pressure forexample upon application of a force, by rolling on to a pillow etc., onthe device causing a bottoming event or further a rigid chamber elementmay experience situations where external pressure on the device on oneside causes a transfer of force to the opposite side of the device.Events such as these may cause discomfort, dislodging of the device orboth.

In one aspect, the chamber element is formed with one or more recessespositioned therein. In preferred embodiments, the chamber element maycontain several recesses. As used herein, a recess refers to a spacecreated by molding a portion of the chamber element thinner than thesurrounding material such that when a force is applied the thinnermaterial is able to bend, flex or compress and rebound. The recess ispreferably of a thickness to provide the desired properties withoutrupturing or causing collapse of the chamber element when a therapeuticlevel of negative pressure is applied.

In certain embodiments one or more recesses are located at points in thechamber element of the therapy device where additional flexibility ofthe device is needed to reduce point loads where the flange elementcontacts the user, for example at regions where the device needs tofollow anatomical features that rapidly change direction or areparticularly hard. By way of example the chin feature, mental tuberclesand or the lower neck feature at or around the laryngeal prominence,nearest the second and fourth locations on the user respectively,represent such features. The recess can be of any appropriate shapehowever in some embodiments the compressible recess is approximatelycrescent in shape. As used herein a “crescent shape” is described asgenerally the shape produced when a circular disc has a segment ofapproximately another circular disc removed from its edge so that whatremains is a shape enclosed by two circular arcs of different diameterswhich intersect at two points. This feature provides a region ofcompressibility that tapers from regions where larger compression isneeded (the middle of the crescent) to regions where less compression isneeded (the outer points of the crescent)

In certain embodiments the therapy device may contain one or more firstrecesses located at approximately at a junction formed between theflange element and the chamber element at approximately the flanks ofthe chin feature of the chamber element near the mental tubercles of theuser, closer to a point nearer to the second location of the user thanany of the other locations providing for a first hinge region. Locatedapproximately at a junction, as used herein describes a location closerto one point verses another nearer to where but perhaps not exactly, forexample, “one or more first recesses located approximately at a junctionformed between the flange element and the chamber element correspondingto the second location” indicates the location of the recess being neara point where the chamber element meets the flange element however notexactly at said junction. As used herein the “flank of the chin”describe the points of the chin where it bends from the front of theface of the user and progresses backwards along the mandible toward thegonion. The bend, creating an anatomical feature where a compressiblerecess may be beneficial. As used herein the first hinge region isdefined as point on the therapy device that can pivot creating adecoupling of one side of the device from the other side of the device.

In certain aspects a recess may be of approximately 0.75 inches inlength from tip to tip of the crescent and approximately 0.125 inches inwidth at the center of the crescent. Further as the compressiblerecesses flank the chin feature of the device, the compressible recessesmay begin at a location approximately 0.5635 inches from the verticalcenter of the device and progress following approximately the shape andcontour of the edge of the chamber element and contact surface of theflange element.

In certain embodiments the therapy device may contain one or more secondcompressible recesses within the chamber element approximatelypositioned at a junction formed between the flange element and thechamber element at approximately the lower neck portion of the chamberelement nearest the fourth location of the user providing for a secondhinge region within the chamber element. The compressible recess may beof a crescent shape that approximately follows the edge of the chamberelement and radius/contour of the contact surface of the flange element.The compressible recess may be of approximately 1 inch in length fromtip to tip of the crescent and approximately 0.25 inches in width at thecenter of the crescent.

In certain embodiments the first and second compressible recessesprovide for first and second hinge regions that are configured to reducethe transmission of deformational strain within the chamber elementrelative to a chamber element lacking the first and second hingeregions. A hinge region, as used herein describes a region of the devicewhere one side can bend or pivot independent of the opposite side. Theterm “deformational strain” as used herein refers to a force applied onthe therapy device that causes collapse of the chamber element ordisengagement of the device from the individual during use. By way ofexample, if a user rolls onto a pillow on one side of the device,deformational strain may be transmitted to the other side, causing thedevice to lift off of the face. The hinge region(s) alone or incombination with other design features described herein effectivelyallows for a decoupling of force from one side of the device andmaintains the device's position on the user and therapy.

The term “balance” as used herein refers to the contact pressure of thetherapy device being approximately equal at each station of the contactsurface. This contact pressure is proportional to therapy vacuum levelsrelative to the contact area of the therapy device. For example, in acomparison, a larger contact area vis. a smaller contact area, under thesame therapy vacuum level will provide for lower contact pressure of thetherapy device respectively. In an embodiment of the invention thecontact area of the flange element relative to the therapy area providesfor a contact pressure that may range from approximately 0.9 toapproximately 1.5 times the vacuum level and in a preferred embodimentthe contact pressure of the flange element is approximately 1.2 timesgreater than therapy vacuum levels.

The chamber element is operably connected to an air pump to produce thetherapeutic level of negative pressure within the chamber element. Theair pump can be of any type to suitable to produce the therapeutic levelof negative pressure for example positive displacement pumps, impulsepumps, velocity pumps, etc which can include manual squeeze bulbs,rotary pumps, lobe pumps, oscillatory pumps etc. In certain embodimentsthe air pump comprises a piezoelectric material configured to provide anoscillatory pumping action wherein the oscillatory pumping motionoperates at a frequency greater that 500 Hz.

The air pump may be a separate component connected to the chamberelement via a hose or tube, or may be configured integrally to thechamber element. The air pump can be connected to the chamber element inany suitable fashion for example an air pump may external the chamberelement and connected via a hose or tube, stationary, for examplebed-side, or battery powered and wearable by the patient. In certainwearable aspects, the air pump is configured to be integral to thechamber element. For example, the air pump may be configured to insertinto a sealable aperture on the chamber element, the air pump tightlyfitting through the aperture creating a seal. As used herein a sealableaperture is an opening through an element of the apparatus that can beclosed or sealed from one side or the other with another element of theapparatus creating an air-tight or water tight seal.

In a preferred embodiment, a seal is created via surfaces designed toreceive an O-ring. As used herein an O-ring is a gasket in the form of acompliant sealing ring made of a pliable material designed to becompressed during assembly creating a seal at the interface. In certainaspects a complaint sealing ring feature may be an integral, unitary ordiscrete part of the air pump, the vessel element or both. In certainembodiments. the compliant sealing ring is provided as a component ofthe air pump. In a preferred embodiment, the compliant sealing ringfeature is a molded feature on the inner circumference of the apertureof the vessel element.

In further embodiments a seal is created via surfaces designed toreceive an O-ring gland design where a molded or machined groove orchannel is provided on either the surface of the pump housing or thesurface of the chamber element and an O-ring is fitted in the groovesuch that when the pump housing and chamber element are fitted anair-tight seal is achieved. The groove, providing a controlled space, isdesigned to receive the O-ring where the height of the grooved space isslightly smaller than the O-ring section area such that the O-ringprotrudes above the groove. The grooved space can be square or roundedat the base and have a volume larger than the O-ring allowing for thecompliant ring to compress freely during assembly. Further the sides ofthe grooved space can be vertical or angle outward where the base of thegroove is narrower than the top of the groove assisting with providingadditional volume of the groove.

The O-ring type or O-ring gland design compliant sealing ring can be anintegrated or discrete component of the chamber element or may beprovided as an integrated or discreet component of the air pump. Inembodiments utilizing O-ring gland designs, the insertion of the pumphousing into the chamber element causes the protruding surface of theO-ring to make contact with a sealing surface, compressing the O-ring into the additional volume of the groove and creating an air-tight seal.The effectiveness of the seal can be modulated through the use ofcompliant sealing rings of varying durometers (range 20 to 70,preferably around 30), height of the compliant sealing ring, depth andwidth of the groove, inner and outer diameters of the pump housing andchamber element and a combination of two or more of these parameters togive an o-ring gland radial squeeze of 2 to 10% in use.

In further embodiments, a compliant sealing ring is created via surfacesdesigned to provide and receive a lip seal. As used herein a lip-typeseal consists of a substantially cylindrical compliant flange or tangdesigned to receive and seal statically against a matching substantiallycylindrical surface, for example wherein the lip seal is integrated into the chamber element and the housing of the air pump forms anair-tight seal when inserted into the chamber element. As used herein,substantially cylindrical refers to a shape that includes but is notlimited to a round cylinder an oval cylinder and shapes that lack sharpedges wherein a sharp edge can be defined as a point where two vectorsintersect creating a corner-like element.

In some examples, a point of contact is formed by two angles, with thevacuum side larger than the exterior side angle. The two angles can bevaried to establish differing pressure distribution at the seal contactpoint. Pressure distribution of the lip-seal can also be varied throughthe usage of materials of varying hardness (range 20 to 50 durometer),varying thickness (0.6 to 1.2 mm) and varying heights (1 to 3 mm) of thelip seal. The harder, thicker and taller the lip seal, the higher thepressure on the sealing surface. It is desirable to have a seal that iseasily created and released by a user while maintaining an air tightseal between the chamber element and pump housing. Further it isdesirable to have a flexible seal that allows movement of the pumphousing within the chamber element while maintaining the seal. Thereforein a preferred embodiment the lip seal is approximately 0.8 millimetersin thickness, approximately 2.0 millimeters in length, allowing forapproximately 1.5 millimeters of movement of the sealing surface using asilicone with a Shore A durometer of approximately 40 when the device isplaced on a user and an approximate therapeutic level of negativepressure is applied within the chamber element.

In preferred embodiments the lip-seal is molded in a neutral orientationon the pump aperture of the chamber element such that the lip is notbiased inward or outward of the chamber element. Insertion of the pumphousing into the chamber element will cause the tip of the lip seal tomake contact with the pump housing. As the pump housing is fullyinserted the sealing surface between the pump housing element and lipseal will increase along the lip seal as the lip-seal bends inwardapproximately 90 degrees and lays on the pump hosing element thuscreating the air tight seal. In certain examples, the chamber elementmay be designed with a cavity to receive the lip-seal as it bends induring assembly, including insertion of the pump housing element intothe chamber element. The lip-seal feature substantially isolates thesealing feature of the chamber element from the induced structural loadscaused by the chamber element during use. As used herein, structuralloads of the chamber element can include vertical, horizontal, diagonal,compression of the chamber element for example or any combinationthereof.

In preferred embodiments, when the pump housing element is installed inthe chamber element, the sealing surface of the lip-seal extends fromthe tip of the lip-seal, outward toward the exterior air-side of thechamber element to the point where the lip-seal bends and contact isinterrupted from the pump housing element. The sealing surface isdesigned to an appropriate length to accommodate compression andmovement of the chamber element such that if the pump housing were tomove outward, reducing the sealing surface or the chamber were toexperience excessive moment or compression causing a portion of the sealto lift away from the pump housing and the sealing surface is reduced,an air-tight seal would still be maintained when a therapeutic level ofnegative pressure is applied during use. As used herein an appropriatelength is defined as a sealing surface containing a lip seal that isapproximately 0.8 millimeters in thickness, approximately 2.0millimeters in length, allowing for approximately 1.5 millimeters ofmovement of the sealing surface using a silicone with a Shore Adurometer of approximately 40 and able to maintain an approximatetherapeutic level of negative pressure when the device is placed on auser and vacuum is applied within the chamber element.

In certain embodiments, some lip seals may contain additional auxiliarylips or ridges along the sealing surface that may serve to protect theprimary sealing lip from excessive wear, for example, from contaminantsand repeated installation and removal. The lip-seal may also vary inthickness, width, length, material and hardness allowing for control ofthe rigidity of the lip seal, length of the sealing surface andtightness of the fit between the interfacing surfaces that vary inresponse to varying levels of negative pressure In certain aspects ofthe invention, one or more tangs, tabs and or recesses are present onthe chamber element, flange element and or air pump element of thetherapy device, which provide one or more guidance feature(s) to ensurea proper orientation of, or mating between one or more device elements.The tangs, tabs and or recesses can be utilized as part of a sensorsystem to determine various parameters related to use of the therapydevice. These parameters can include, but are not limited to,compatibility of the particular air pump element with the therapy deviceelement (e.g., acting as a recognition feature) and correct placement ofthe air pump element into the aperture of the chamber element. Forexample, one or more of these tangs, tabs or recesses can be located onthe chamber element as a guidance feature for the air pump element suchthat a recess on the air pump element or chamber element accepts thetang or tab element on the chamber element or air pump element only whenthe air pump element is inserted through the sealable aperture in thecorrect orientation. This list is not meant to be limiting.

In certain embodiments, together or with one or more of the foregoing, amaterial, which will act as an adhesive layer between the flange elementof the therapy device and the user, is applied to the outer contactsurface of the flange element. The purpose of the adhesive layer is toprovide a sealing, cushioning and or sheer absorbing element to theflange element. As used herein sheer refers to sheer strain which is adeformation of a material in which parallel surfaces can slide past oneanother, for example the contact surface of the flange element and theskin of the user.

The adhesive layer further must preferentially adhere to the outercontact surface of the negative pressure therapy device and provide asufficient level of “tack” such that a releasable mechanical anchoringof the therapy device to the skin of the user is achieved. Tack, as usedherein, refers to a material property at the interface created betweenthe adhesive layer and the device, and the skin of the user at the otherinterface created between the user and the device.

The adhesive layer may be applied to the contact surface area of thenegative pressure therapy device in any suitable method including butnot limited to spraying, painting, placing, etc., in single or multiplelayers to achieve the desired cushioning and sealing propertiesincluding but not limited to thickness, hardness and tack for example.In additional embodiments the adhesive layer may be single layer of auniform thickness or a single layer of a non-uniform thickness coveringthe contact surface of the negative pressure therapy device. In furtherembodiments the adhesive layer may contain a series of parallel adhesivebeads spanning the circumference of the contact surface of the negativepressure therapy device wherein the beads can be of a uniform ornon-uniform thickness and of a like or varying adhesive and or gel-likematerial to achieve the desired cushioning and sealing properties.

In certain embodiments the adhesive layer is present on the contactsurface of the negative pressure therapy device at a thickness fallingwithin a range of approximately 0.005-0.060 inches. In certainembodiments the adhesive layer is present on the contact surface of thenegative pressure therapy device at a thickness falling within a rangeof approximately 0.010-0.050 inches. In further embodiments the adhesivelayer is present on the contact surface of the negative pressure therapydevice at a thickness falling within a range of approximately0.020-0.040 inches.

The adhesive layer may be achieved by using various materials, such as,but not limited to gel, elastomer, viscous solutions, foams andmaterials of the like. These materials can be of any chemicalcomposition which provides the necessary end use properties (i.e. tack,firmness, medical clearance, etc.). These materials include, but are notlimited to polyurethanes, silicones, acroylnitrile butadiene styrene(ABS), hydrogels, and the like. In preferred embodiments, the adhesivelayer should have a hardness as measured by ASTM-D2240-00 (AmericanSociety for Testing Materials) of between 0 and 50, more preferablebetween 5 and 30 most preferable between 5 and 15. In certainembodiments the adhesive layer is made of a silicone gel material. Thesilicone can be any organosilicone which yields the desired propertiesalthough polydimethylsiloxane (PDMS) is often chosen.

The adhesive layer may be applied directly to the outer contact surfaceof the flange element to a desired thickness or in combination with oneor more primer layer and or one or more primer layers in combinationwith one or more adhesion or binding promotor layers to create alamination stack of materials to a desired thickness. As used herein a“primer” is a substance used as a preparatory coating, acting as ajoining surface between the contact surface of the negative pressuretherapy device and adhesive layer or an adhesion promoting layer and theadhesive layer. Further, an adhesion promoting layer is a substance usedas a coating to preferentially adhere the adhesive layer to the contactsurface of the negative pressure therapy device and or the primer layerthat is applied to the outer surface of the negative pressure therapydevice.

By way of example, a primer layer may be applied to the contact surfaceof the negative pressure therapy device to a thickness of about 0.005inches, followed by an adhesive promoting layer to a thickness ofapproximately 0.005 inches, followed by the application of an adhesivelayer to a thickness of approximately 0.040 inches achieving a finalthickness of approximately 0.050 inches. A primer layer may be applieddirectly to the outer contact surface of the negative pressure therapydevice followed by the application of the adhesive layer directly to theprimer to a desired thickness of approximately 0.050 inches. Inadditional embodiments, an adhesive promoter may be applied to thecontact surface of the negative pressure therapy device followed by theapplication of the adhesive layer to a desired thickness ofapproximately 0.050 inches.

In certain embodiments the adhesive layer is a gel layer. As used hereina gel layer is a layer of material that can have properties that aremostly liquid however behave like solids due to the cross-linked natureof its structure. The material chosen for the gel layer may be of acertain cohesive pliable consistency so as to mold to and conform tocomplex shapes for example imperfections in the skin. As used hereincohesive pliable consistency, elasticity or firmness of the gel layer isdefined as the gel layer's ability to flow, mold and stretch andsubstantially return its original shape when not applied to a surface.The material chosen for the gel layer may also be of a certain tack soas to mechanically secure to the contact area. As used herein tack isdefined as the gel's “stickiness” and is the property that allows theimmediate formation of a bond on contact with another surface

The adhesive layer material must adhere sufficiently to the therapeuticdevice such that it stays adhered to the device when the device isremoved from the user's skin. Additionally, must have a tack level thatis chosen for appropriate performance at the user's skin interface. Thatis, at too great a level of tack removal of the device from the skin canbe difficult, painful or injurious. While insufficient tack can allowthe device to move during use or allow the seal to the skin to openthereby losing the vacuum. The level of tack can be measured by atexture analyzer. For example, using a TA.XT plus with a 7 mm radius and1 inch diameter spherical head the peak adhesion values should be in arange of 200 to 400 grams peak force more preferably 250 to 350 gramspeak force and most preferably 275-325 grams peak force.

As discussed above the tack of the adhesive layer is optimized toachieve a releasable but mechanical anchor of the therapy device to thepatient. In certain embodiments the contact surface of the flangeelement is coated with a primer to preferentially anchor the adhesivelayer to the negative pressure therapy device over the contact region ofthe user.

In certain embodiments the adhesive layer is formed from a washablesilicone gel such that when washed and allowed to dry, the adhesivelayer returns towards an initial tack. In certain embodiments thesilicone gel is chosen from a group with properties that can becontrolled including, but not limited to: cross sectional thickness,degree of crosslinking (and thereby firmness and tack) and viscosity (soas to be processable under desired conditions. As used herein viscosityis measured in cps referring to centipoise (cps) were 1 cps=0.01 g/cm/s.

In an embodiment of the invention the gel layer is a prepared from atwo-part platinum cured organosilicone mixture with propertiesequivalent to a silicone gel base having an uncatalyzed viscosity ofabout 20,000 cps and a crosslinker having an uncatalyzed viscosity ofabout 300 cps. The final firmness (cps) of the cured gel may beincreased by increasing the proportion of the crosslinker in the mixtureor decreased by lowering the proportion of the crosslinker in the mix.The tack of the material can be increased by decreasing the proportionof crosslinker in the mixture or decreased by increasing the proportionof crosslinker in the mix. In order to achieve the desired propertiesusing a silicone gel base of 20,000 cps and a crosslinker of 300 cps,the ratio of silicone gel base to crosslinker may range (in parts byweight) from about 10.0:0.01 to about 10.00:10.20

In embodiments of the invention the ratio of 20,000 cps silicone gelbase to 300 cps cross linker may further range from about 10.0:0.01 toabout 10.0:0.5. In other embodiments of the invention the ratio of20,000 cps silicone gel base to 300 cps crosslinker may range from about10.0:0.01 to about 10:0.1. And in further embodiments of the inventionthe ratio of 20,000 cps silicone gel base to 300 cps crosslinker mayrange from about 10.0:0.06 to about 10:0.20

By example of the invention the silicone gel base and the crosslinkerare mixed in desired ratios and placed under vacuum in order to removeany bubbles in the mixed solution (de-gassing). Following de-gassing,the silicone gel solution is applied to the contact surface of theflange element and allowed to cure. The mixture can achieve full cure inapproximately 24 hours at room temperature however in some embodiments afull cure of the silicone gel may be achieved in about 5 minutes byplacing the therapy device containing the silicone gel layer at about150° C. The cure temperature may be adjusted to suit limiting elementsof the therapy device, for example lower melting points of other therapydevice elements.

In certain embodiments the adhesive layer is made of a hydrogel.Hydrogels are a three dimensional network of crosslinked hydrophilicpolymer chains that can be crosslinked either physically or chemically.Due to the hydrogel materials significant water content, hydrogels canresemble natural soft tissue more than any other type of polymericbiomaterial. In further embodiments the hydrogel layer may be found as ahydrocolloid wherein the colloid particles are hydrophilic polymersdispersed in water.

In certain embodiments the adhesive layer is made of a combination ofmaterials applied side-by side on the outer contact surface of thefluidly sealed chamber element. By way of example, a hydrogel materialmay be applied to the circumference of the center portion of the outercontact surface of the fluidly sealed chamber element and a silicone gelmaterial may be applied on either side peripheral to the hydrogelmaterial. In further embodiments where a combination of materials areapplied side-by-side on the outer contact surface of the flange element,a silicone gel layer may be applied to the circumference of the centerportion of the out contact surface of the fluidly sealed chamber elementand a hydrogel material may be applied to either side peripheral to thesilicone gel material followed by a final application of a silicone gelmaterial peripheral to the hydrogel material.

As used herein, “user compliance” refers to the patient's adherence tothe prescribed usage of a therapy device for example the usage of adevice throughout a sleep cycle.

As used herein, “device compliance” refers to the ability of the deviceor elements of the device to accommodate variation, for example,bending, twisting, compressing and or expanding of the device inresponse to device application and usage including anatomical variationsof the patient.

Aspects of the device may be made of a generally rigid material. Theterm “generally rigid” as used herein refers to a material which issufficiently rigid to maintain the integrity of the particular elementin question. The skilled artisan will understand that a number ofpolymers may be used including thermoplastics, some thermosets, andelastomers. Thermoplastic materials become flowing liquids when heatedand solids when cooled, they are often capable of undergoing multipleheating/cooling cycles without losing mechanical properties. Thermosetmaterials are made of prepolymers which upon reaction cure irreversiblyinto a solid polymer network. Elastomers are viscoelastic materialswhich exhibit both elastic and viscous properties and can be either athermoplastic or thermoset. Common thermoplastics include PMMA, cyclicolefin copolymer, ethylene vinyl acetate, polyacrylate,polyaryletherketone, polybutadiene, polycarbonate, polyester,polyetherimide, polysulfone, nylon, polyethylene, and polystyrene.Common thermosets include polyesters, polyurethanes, duroplast, epoxyresins, and polyimides. This list is not meant to be limiting.Functional filler materials such as talc and carbon fibers can beincluded for purposes of improving stiffness, working temperatures, andpart shrinkage.

Aspects of the device may be formed using a number of methods known tothose of skill in the art, including but not limited to injectionmolding, machining, etching, 3D printing, etc. In preferred embodiments,the test device base is injection molded, a process for formingthermoplastic and thermoset materials into molded products of intricateshapes, at high production rates and with good dimensional accuracy. Theprocess typically involves the injection, under high pressure, of ametered quantity of heated and plasticized material into a relativelycool mold—in which the plastic material solidifies. Resin pellets arefed through a heated screw and barrel under high pressure. The liquefiedmaterial moves through a runner system and into the mold. The cavity ofthe mold determines the external shape of the product while the coreshapes the interior. When the material enters the chilled cavities, itstarts to re-plasticize and return to a solid state and theconfiguration of the finished part. The machine then ejects the finishedparts or products.

Those skilled in the art will appreciate that the conception upon whichthis disclosure is based may readily be utilized as a basis for thedesigning of other structures, methods and systems for carrying out theseveral purposes of the present invention. It is important, therefore,that the claims be regarded as including such equivalent constructionsinsofar as they do not depart from the spirit and scope of the presentinvention.

The therapy device of the present invention comprises structuralmember(s) that interfaces outside a targeted therapy area of a patient.In a preferred embodiment the therapy area is that of the upper airway.The therapy device contains a chamber element 100 that is used to createa vacuum between an inner surface of the appliance and the skin of theupper neck/chin region. The chamber element 100 is secured to a flangeelement 105 at a single point along the back of the flange element thatevenly distributes the force across all of the flange element. Thechamber element 100 may contain one or more compressible recesses 135and 155 to further assist in evenly distributing force across all of theflange element 105. The chamber element 100 may also have an aperture115 for the insertion of a vacuum source and an O-ring like feature 110around the inner circumference of the aperture to assist in the sealingof the vacuum source to the chamber element 100. The device may beformed, molded, or fabricated from any suitable material or combinationof materials. Non-limiting examples of such materials suitable forconstructing the therapy appliance include plastics, metals, naturalfabrics, synthetic fabrics, and the like. The device may also beconstructed from a material having resilient memory such as, but notlimited to, silicone, rubber, or urethane.

In an embodiment of the invention, as can be seen in FIG. 5. showing across-sectional view 140 of the negative pressure therapy device, thedevice contains a chamber element 100 in the form of a dome, the chamberelement having a mandible recess(s) 135 and a flange element 105 with anouter contact surface of the flange element 106 configured to conform toapproximately the upper airway of a user, the flange element containingtapered edges 145 to ensure a smooth transition on the skin of the userand eliminate edge effects.

FIG. 6a-6d show cross-sectional views the device. FIG. 6b shows across-sectional view of the device across the A-A plane FIG. 6aincluding the chamber element 100, the contact surface of the flangeelement 106, the compressible neck recess 155, the air pump aperture 115and O-ring feature. FIG. 6c shows a detailed view, FIG. 6b 150, of thecompressible neck recess 155 in a crescent shape following the contourof the edge of the chamber element and the region of compression 165that extents from one corner of the crescent to the other. FIG. 6d showsa cross-sectional view of the chamber element 100 with the contactsurface of the flange element 106, a cross-sectional side view of thecompressible neck recess 155 and tapered edges of the flange element145.

The flange element 105 is designed to accommodate variations in stationload upon placement of the therapy device on a subject and applicationof a therapeutic level of negative pressure. This is accomplished bydevice design and structural elements that anticipate known anatomicalfeatures as well as structural elements that can accommodate surfacevariations that occur during use. FIG. 7, showing the rear of thetherapy device with the chamber element feature 100 and contact surfaceof the flange element 106 has a line bisecting the device 120 forpurposes of FIG. 8. In order to further graphically illustrate thecushioning feature(s) of the device, FIG. 8 shows aflattened/two-dimensional approximate tracing of half of the therapydevice with chamber element 100 and contact surface of the flangeelement 106, with the bisecting line 120 as seen in FIG. 7 and paralleldashed lines 170 following the flange element 106 showing theapproximate junction/root 109 of the chamber element 100 on the rear ofthe flange element (distal to the contact surface of the flangeelement). The location of the root 109 can vary on the flange element toincrease or decrease the vacuum cross section. A larger inside rootlength 107 as compared to the outside root length 108 will effectivelyincrease the vacuum cross section and conversely a larger outside rootlength as compared to inside root length will effectively decrease thevacuum cross section.

The flattened half of the contact surface of the flange element 106 isapproximately sectioned into 20 stations beginning at station 1, locatedclosest to the upper middle section of the device at location two on theuser, that makes contact approximately with the chin of the user,progressing through stations 8-13 traveling over approximately the firstand third locations on the user, over approximately the mandible andgonion approaching the ear and down to the neck toward station 20located at the bottom portion of the half of the flange element locatedapproximately at location four on the user at approximately at themiddle of the neck of the user. Located approximately and/orapproximately positioned, as used herein describes a location closer toone point verses another but perhaps not exactly at one exact positon oranother for example: “located approximately at location four on the userat approximately the middle of the neck of the user” describes thelocation being nearer to the middle of the neck of the user thanlocation(s) one and three corresponding to the mandible and gonion ofthe user.

Absent features, for example a specific chamber element orientation onthe flange element FIG. 8, 170 or the compressible recesses 135 and 155or a flange element of varying widths FIG. 9 and FIG. 10 or thicknessesFIG. 9 and FIG. 11 (and structural features therein) to balance thecontact pressure of the device when a therapeutic level of negativepressure is applied, a user would experience varied contact pressures,for example, lower contact pressure in regions where the cross sectionof the dome decreases due to the non-symmetric shape of the dome forexample at the tips of the oval shaped dome/at the ends of the device,specifically through approximately stations 8-13 FIG. 8, or highercontact pressure in regions where there is a large vacuum cross section,for example through approximately stations 1-3 and 18-20. Thereforethese areas contain cantilever and hoop structure-type features FIG. 12,that alone or together equalize the contact pressure through the entirecontact surface of the flange element giving a station load on the userof a non-varying or minimally varying value, FIG. 13.

The characteristics of the flange element and chamber element areadjusted to accommodate for the variation in anatomy that necessitatethe shape of the device, for example where the device encounters bendsaround at approximately location two on the used at approximately thechin/mandible, at approximately stations 2-4 and at approximatelylocation four at approximately the lower neck, at approximately stations17-20 the flange element predominantly experiences hoop-forces that,absent design features would stiffen the flange element creating a highpoint load. Therefore, hoop-forces that cause stiffening of the flangeare balanced in part by varying the perpendicular width (FIG. 9, FIG. 10and FIG. 14, 185) and thickness (FIG. 9 and FIG. 11) of the flangeelement, for example in FIG. 10, stations 1-4 and 17-20 are wider andthinner allowing for more flexibility.

In areas where the flange element lays flatter on the user, for exampleat approximately stations 5-15 the flange element predominantlyexperiences cantilever forces, FIG. 12, therefore cantilever structuresare present to capture and balance the contact pressure. For example, atapproximately stations 5-15 the width of the flange element decreasesFIG. 9 and FIG. 10. The combination of the balancing features of thetherapy device provide for an approximate balancing of the observedcontact pressure FIG. 14, 200, of the therapy device on the user when atherapeutic level of negative pressure is applied. For example, FIG. 13shows the approximate station load variation when all structuralfeatures are combined and a therapeutic level of negative pressure isapplied.

Further illustration of the therapy device can be seen in FIG. 14 thatshows a cross section 160 of the therapy device, with the chamberelement 100, flange element 105, contact surface of the flange element106, vacuum side (root inside) 107 and air side (root outside) 108 ofthe device, the root/junction/balance point 109 of the chamber elementon the flange element, total flange element width (perpendicular width)185, chamber element bias on the flange element 192 (root inside) 107,acting vacuum portion of the flange element 195 and contact pressurerepresentation of the flange element on the user 200.

In certain embodiments the perpendicular width FIG. 14, 185 of theflange element is varied to increase or decrease the contact pressure200 at certain stations along the contact surface of the flange element106. A decrease in the perpendicular width 185 reduces the station areaultimately increasing the contact pressure for that segment area when atherapeutic level of negative pressure is applied. For example, in FIG.8 as one approaches stations 8-13 one can see the perpendicular 185width decreases. Therefore, when one combines a known variation in domestation load with a design feature configured to accommodate thevariation a lowest possible station pressure variation can be achieved.

The compliant sealing ring 110 is designed to create and maintain an airtight seal between the chamber element 100 and the pump hosing elementFIG. 18; 230. In certain embodiments, the sealing ring is in the form ofa lip seal 205; FIG. 17, FIG. 18 and FIG. 19. FIG. 16, showing the rearof the therapy device with the chamber element 100, the flange element105, contact surface of the flange element 106 element has a linebisecting the device 120 for purposes of FIG. 17. In order to fullyillustrate the lip-seal feature 205 of the device, FIG. 17 shows athree-dimensional view and a detail box 215 of the chamber element 100with a pump aperture 115 containing a lip-seal 205 and lip-seal cavity210 to receive the lip-seal during use, also seen in this view is thecompressible recess 155 located on the chamber element a positionapproximately corresponding to the laryngeal prominence, FIG. 15A.

The lip-seal feature 205 and lip-seal cavity 210 of the chamber element100 can be seen in FIG. 18 wherein the lip-seal 205 is uncompressed andin an un-biased positon without the pump housing element installed. Thesurface of the lip-seal that will make contact with the pump housingelement begins with the lip-seal edge 225 and continues along thelip-sealing surface 220. Upon insertion of the pump housing element 230;FIG. 19, the lip-seal 205 is folded in approximately 90 degrees into thelip-seal cavity 210 and is in is deflected position 207.

Device balancing may also be accomplished through variation in otherstructural elements of the chamber element or flange element bothlocally and throughout the contact surface, for example length or widthof compressible recesses, chamber element or flange element thicknessand shape of the central bend of the device alone, whole or in part. Ina preferred embodiment the structural elements including the aspectratio of the flange element may change to provide minimal variation incontact pressure wherein the contact pressure is approximately 1.2 timesthat of the applied vacuum at all contact points of the flange element.

Structural embodiments of the apparatus may vary based on the size ofthe device and the description provided herein is a guide to thefunctional aspects and means.

One skilled in the art readily appreciates that the present invention iswell adapted to carry out the objects and obtain the ends and advantagesmentioned, as well as those inherent therein. The examples providedherein are representative of preferred embodiments, are exemplary, andare not intended as limitations on the scope of the invention.

It will be readily apparent to a person skilled in the art that varyingsubstitutions and modifications may be made to the invention disclosedherein without departing from the scope and spirit of the invention.

All patents and publications mentioned in the specification areindicative of the levels of those of ordinary skill in the art to whichthe invention pertains. All patents and publications are hereinincorporated by reference to the same extent as if each individualpublication was specifically and individually indicated to beincorporated by reference.

The invention illustratively described herein suitably may be practicedin the absence of any element or elements, limitation or limitationswhich is not specifically disclosed herein. Thus, for example, in eachinstance herein any of the terms “comprising”, “consisting essentiallyof” and “consisting of” may be replaced with either of the other twoterms. The terms and expressions which have been employed are used asterms of description and not of limitation, and there is no intentionthat in the use of such terms and expressions of excluding anyequivalents of the features shown and described or portions thereof, butit is recognized that various modifications are possible within thescope of the invention claimed. Thus, it should be understood thatalthough the present invention has been specifically disclosed bypreferred embodiments and optional features, modification and variationof the concepts herein disclosed may be resorted to by those skilled inthe art, and that such modifications and variations are considered to bewithin the scope of this invention as defined by the appended claims.

Other embodiments are set forth within the following claims:

What is claimed is:
 1. A therapy device configured for theadministration of negative pressure upon the external surface of theindividual, the therapy device comprising: a chamber comprising (i) aflange element defining a periphery of the chamber element and adaptedto form a sealing surface when mated to the individual, wherein a firstsurface of the flange element is configured to approximately conform toa continuous contact area on the individual defined by a first locationcorresponding to a first gonion on one side of the individual'smandibular body, a second location corresponding to the individual'smental protuberance, a third location corresponding to a second gonionon the opposite side of the individual's mandibular body, and a fourthlocation corresponding to the individual's thyroid cartilage, (ii) achamber element affixed to the flange element such that an airtightjunction is provided between the flange element and the chamber element,wherein the chamber element is configured to define a chamber elementoverlying the external surface of the individual bounded by the flangeelement and to apply a force to the external surface of the individualwhen a therapeutic level of negative pressure is applied within thechamber element, the force sufficient to maintain patency of the upperairway by drawing the external surface of the individual into thechamber element, (iii) one or more first recesses located approximatelyat a junction formed between the flange element and the chamber elementat the second location, the first recesses providing a first hingeregion within the chamber element, and (iv) one or more second recesseswithin the chamber element approximately positioned at a junction formedbetween the flange element and the chamber element at the fourthlocation, the second recesses providing a second hinge region within thechamber element, wherein the first and second hinge regions areconfigured (i) to reduce the transmission of deformational strain withinthe chamber element relative to and (ii) to reduce point loads where theflange element contacts each of the individual's mental tubercles andthe individual's thyroid cartilage when the therapeutic level ofnegative pressure is applied within the chamber element, the reductionsbeing relative to a chamber element lacking the first and second hingeregions; wherein the flange element varies in thickness such that thefirst and third locations are substantially thicker than the fourthlocation; wherein the junction formed between the flange element and thechamber element at the first and third locations are positioned on theflange element such that at least 20% of the width of the flange elementis positioned within the interior of the chamber element; and an airpump operably connected to the chamber element to produce thetherapeutic level of negative pressure within the chamber element.